Abstract:Underground-ditch-patter soil treatment is a procedure whereby sewage is treated through self-purification in conjunction with manual techniques in a small scale system. This process is a kind of fleet soil zoology treatment technology, which relies on the principles of diffusion and capillary action in soil. Under artificially controlled conditions, sewage was distributed into the designated system equipped with a series of devices composed of soil, sand, pebbles, and a soil-water-animalcule-filling syst...